
Strowger 2000-type two-motion group selector
circa 1980
circa 1980
1979
1978
1978
1986
1979
1979
2000-100 BCE
1980
1979
1980
1980
(1962); 1982
1979
1990-96
1979
1839 (original); circa 1988 (replica)
1978-1980
4000-2001 BCE
1980
1978
1978-1980
1979
1978
circa 1980
1979
1903 (original); 1982 (model)
1978
circa 1980
1990-95
1980
circa 1980
2050-1750 BCE
1978-1980
1978
circa 1980
1980
1980
1980
1980
1989-08
1978
1980
1979
1979
1980
2000-500
1980
15/7/27
1979/80